Yea,..its kinda nightmare to add some info to these reports, but well,... I'll try it. My way to reproduce this "issue" that work all the time:

(1) Get in 'non-combat' stance (double-click left CRTL)
(2) Start running (hold W)
(3) Use zoom-in (press right mouse button)

In this condition the soldier start running and stop respond to most of the basic controls. Running can be stopped by:
(1) Use interaction menu, like switching to sidearm or open door
(2) Vault (press V)